bond formed by positively charged metal ions and electrons around them

noble gases

ion with a negative charge

anion

group 17

electron

simplest chemical formula of a compound

alkaline earth metals

group 18

period

one of 20 naturally occuring compounds that combine to form proteins

bond angle

same atomic number, different mass

isotope

organic compound made of carbon, hydrogen, and oxygen

mole

angle formed by two bonds to the same atom

covalent bond

ion made of two or more covalently bonded atoms

polyatomic ion

group 1

protein

in the nucleus; positive charge

proton

a row on the periodic table

organic compound

in the nucleus; no charge

cation

chemical formula that gives the actual numbers of atoms in one molecule

halogens

the mass of one mole of a substance

chemical bond

the counting unit of chemistry

group

bond formed by the attraction of opposite charges

metallic bond

arrangement of bonded atoms or ions

empirical formula

organic compound that has important role in living things

molecular formula

bond formed when electrons are shared

chemical structure

group 2

polymer

outside the nucleus; negative charge

molar mass

groups 3 through 12

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